According to this thread Adding X to Jessie Lite - Raspberry Pi Forums
To add gui desktop to Jessie lite here’s what’s needed
sudo apt-get install raspberrypi-ui-mods
Here’s a list of all the packages included with full Jessie but removed in Jessie lite
adwaita-icon-theme alacarte alsa-base aspell aspell-en blt bluej claws-mail
claws-mail-i18n coinor-libcbc3 coinor-libcgl1 coinor-libclp1
coinor-libcoinmp1:armhf coinor-libcoinutils3 coinor-libosi1 cryptsetup-bin
cups-bsd cups-client cups-common dbus-x11 dconf-gsettings-backend:armhf
dconf-service debian-reference-common debian-reference-en desktop-base
desktop-file-utils dh-python dictionaries-common dillo eject emacsen-common
epiphany-browser epiphany-browser-data esound-common fontconfig
fontconfig-config fonts-dejavu fonts-dejavu-core fonts-dejavu-extra
fonts-freefont-ttf fonts-opensymbol fonts-roboto fonts-sil-gentium-basic
freepats fuse galculator gconf-service gconf2 gconf2-common gdebi-core
gettext-base giblib1:armhf gir1.2-atk-1.0 gir1.2-freedesktop:armhf
gir1.2-gdkpixbuf-2.0 gir1.2-glib-2.0:armhf gir1.2-gmenu-3.0
gir1.2-gtk-3.0:armhf gir1.2-pango-1.0:armhf git git-core git-man gksu
glib-networking:armhf glib-networking-common glib-networking-services
gnome-desktop3-data gnome-icon-theme gnome-icon-theme-symbolic gnome-menus
gnome-themes-standard:armhf gnome-themes-standard-data gnupg-agent gnupg2
gpicview greenfoot gsettings-desktop-schemas gsfonts gsfonts-x11
gstreamer0.10-alsa:armhf gstreamer0.10-plugins-base:armhf
gstreamer1.0-alsa:armhf gstreamer1.0-libav:armhf gstreamer1.0-omx
gstreamer1.0-plugins-bad:armhf gstreamer1.0-plugins-base:armhf
gstreamer1.0-plugins-good:armhf gstreamer1.0-x:armhf gtk2-engines:armhf
gtk2-engines-clearlookspix:armhf gtk2-engines-pixbuf:armhf gvfs:armhf
gvfs-backends gvfs-common gvfs-daemons gvfs-fuse gvfs-libs:armhf hdparm
hicolor-icon-theme idle idle-python2.7 idle-python3.4 idle3 iso-codes jackd
jackd2 java-common javascript-common leafpad libaa1:armhf libabw-0.1-1
libarchive13:armhf libasn1-8-heimdal:armhf libaspell15:armhf
libasprintf0c2:armhf libass5:armhf libassuan0:armhf libasyncns0:armhf
libatasmart4:armhf libatk-bridge2.0-0:armhf libatk1.0-0:armhf libatk1.0-data
libatspi2.0-0:armhf libaudio2:armhf libaudiofile1:armhf
libavahi-client3:armhf libavahi-glib1:armhf libavahi-gobject0:armhf
libavc1394-0:armhf libavcodec56:armhf libavformat56:armhf
libavresample2:armhf libavutil54:armhf libblas-common libblas3
libbluetooth3:armhf libbluray1:armhf libboost-atomic1.55.0:armhf
libboost-date-time1.55.0:armhf libboost-filesystem1.55.0:armhf
libboost-program-options1.55.0:armhf libboost-regex1.55.0:armhf
libboost-system1.55.0:armhf libboost-thread1.55.0:armhf libc-ares2:armhf
libcaca0:armhf libcairo-gobject2:armhf libcairo2:armhf
libcanberra-gtk3-0:armhf libcanberra0:armhf libcdio-cdda1 libcdio-paranoia1
libcdio13 libcdparanoia0:armhf libcdr-0.1-1 libchromaprint0:armhf
libclucene-contribs1:armhf libclucene-core1:armhf libcmis-0.4-4
libcolamd2.8.0:armhf libcolord2:armhf libcompfaceg1 libcroco3:armhf
libcups2:armhf libcupsfilters1:armhf libcupsimage2:armhf
libcurl3-gnutls:armhf libcwiid1 libdatrie1:armhf libdbus-glib-1-2:armhf
libdc1394-22:armhf libdca0:armhf libdconf1:armhf
libdevmapper-event1.02.1:armhf libdirectfb-1.2-9:armhf libdrm-amdgpu1:armhf
libdrm-freedreno1:armhf libdrm-nouveau2:armhf libdrm-radeon1:armhf
libdv4:armhf libdvdnav4:armhf libdvdread4:armhf libe-book-0.1-1
libegl1-mesa:armhf libelf1:armhf libelfg0:armhf libenca0:armhf
libenchant1c2a:armhf libeot0 libepoxy0 liberror-perl libesd0:armhf
libetonyek-0.1-1 libetpan17:armhf libevdev2 libexif12:armhf
libexpat1-dev:armhf libexttextcat-2.0-0 libexttextcat-data libfaad2:armhf
libffi5:armhf libfftw3-double3:armhf libfftw3-single3:armhf libflac8:armhf
libflite1:armhf libfltk1.3:armhf libfluidsynth1:armhf libfm-data
libfm-extra4:armhf libfm-gtk-data libfm-gtk4:armhf libfm-modules:armhf
libfm4:armhf libfontconfig1:armhf libfontenc1:armhf libfreehand-0.1-1
libfribidi0:armhf libfuse2:armhf libgbm1:armhf libgconf-2-4:armhf
libgd3:armhf libgdk-pixbuf2.0-0:armhf libgdk-pixbuf2.0-common
libgeoclue0:armhf libgfortran3:armhf libgif4:armhf
libgirepository-1.0-1:armhf libgksu2-0 libgl1-mesa-dri:armhf
libgl1-mesa-glx:armhf libglapi-mesa:armhf libgles1-mesa:armhf
libgles2-mesa:armhf libglew1.10:armhf libglib2.0-bin libgltf-0.0-0
libglu1-mesa:armhf libgme0 libgnome-desktop-3-10 libgnome-keyring-common
libgnome-keyring0:armhf libgnome-menu-3-0 libgoa-1.0-0b:armhf
libgoa-1.0-common libgpgme11:armhf libgphoto2-6:armhf
libgphoto2-port10:armhf libgpm2:armhf libgraphite2-3:armhf libgsm1:armhf
libgssapi3-heimdal:armhf libgstreamer-plugins-bad1.0-0:armhf
libgstreamer-plugins-base0.10-0:armhf libgstreamer-plugins-base1.0-0:armhf
libgstreamer0.10-0:armhf libgstreamer1.0-0:armhf libgtk-3-0:armhf
libgtk-3-bin libgtk-3-common libgtk2.0-0:armhf libgtk2.0-bin
libgtk2.0-common libgtkglext1 libgtop2-7 libgtop2-common
libgudev-1.0-0:armhf libharfbuzz-icu0:armhf libharfbuzz0b:armhf
libhcrypto4-heimdal:armhf libheimbase1-heimdal:armhf
libheimntlm0-heimdal:armhf libhsqldb1.8.0-java libhunspell-1.3-0:armhf
libhx509-5-heimdal:armhf libhyphen0 libice6:armhf libid3tag0
libiec61883-0:armhf libilmbase6:armhf libimlib2 libimobiledevice4:armhf
libjack-jackd2-0:armhf libjasper1:armhf libjavascriptcoregtk-3.0-0:armhf
libjbig0:armhf libjpeg8:armhf libjs-jquery libjs-prettify
libjson-glib-1.0-0:armhf libjson-glib-1.0-common libkate1
libkrb5-26-heimdal:armhf libksba8:armhf liblangtag-common liblangtag1
liblapack3 liblcms2-2:armhf libldb1:armhf liblightdm-gobject-1-0
libllvm3.7:armhf liblockfile-bin liblockfile1:armhf libltdl7:armhf
liblvm2app2.2:armhf liblzo2-2:armhf libmad0:armhf libmenu-cache-bin
libmenu-cache3:armhf libmhash2:armhf libmikmod3:armhf libmimic0
libmjpegutils-2.1-0 libmms0:armhf libmng1:armhf libmodplug1 libmotif-common
libmozjs185-1.0 libmp3lame0:armhf libmpdec2:armhf libmpeg2encpp-2.1-0
libmpg123-0:armhf libmplex2-2.1-0 libmspub-0.1-1 libmtdev1:armhf
libmtp-common libmtp9:armhf libmwaw-0.3-3 libmythes-1.2-0 libneon27-gnutls
libnotify4:armhf libnspr4:armhf libnss3:armhf libntdb1:armhf libobrender29
libobt2 libodfgen-0.1-1 libofa0 libogg0:armhf libopenal-data
libopenal1:armhf libopencv-calib3d2.4:armhf libopencv-contrib2.4:armhf
libopencv-core2.4:armhf libopencv-features2d2.4:armhf
libopencv-flann2.4:armhf libopencv-highgui2.4:armhf
libopencv-imgproc2.4:armhf libopencv-legacy2.4:armhf libopencv-ml2.4:armhf
libopencv-objdetect2.4:armhf libopencv-video2.4:armhf libopenexr6:armhf
libopenjpeg5:armhf libopus0:armhf liborc-0.4-0:armhf liborcus-0.8-0
libpackagekit-glib2-18:armhf libpam-systemd:armhf libpango-1.0-0:armhf
libpango1.0-0:armhf libpangocairo-1.0-0:armhf libpangoft2-1.0-0:armhf
libpangox-1.0-0:armhf libpangoxft-1.0-0:armhf libpciaccess0:armhf libpisock9
libpixman-1-0:armhf libplist2:armhf libpolkit-agent-1-0:armhf
libpolkit-backend-1-0:armhf libpolkit-gobject-1-0:armhf libpoppler46:armhf
libportaudio2:armhf libportmidi0 libproxy1:armhf libpth20:armhf
libpulse0:armhf libpython3-dev:armhf libpython3-stdlib:armhf
libpython3.4:armhf libpython3.4-dev:armhf libpython3.4-minimal:armhf
libpython3.4-stdlib:armhf libqscintilla2-11 libqscintilla2-l10n
libqt4-dbus:armhf libqt4-network:armhf libqt4-xml:armhf
libqt4-xmlpatterns:armhf libqtcore4:armhf libqtdbus4:armhf libqtgui4:armhf
libqtwebkit4:armhf libraptor2-0:armhf librasqal3:armhf libraw1394-11:armhf
librdf0:armhf libreoffice libreoffice-avmedia-backend-gstreamer
libreoffice-base libreoffice-base-core libreoffice-base-drivers
libreoffice-calc libreoffice-common libreoffice-core libreoffice-draw
libreoffice-gtk libreoffice-impress libreoffice-java-common libreoffice-math
libreoffice-report-builder-bin libreoffice-sdbc-hsqldb
libreoffice-style-galaxy libreoffice-writer librest-0.7-0:armhf
librevenge-0.0-0 libroken18-heimdal:armhf librsvg2-2:armhf
librsvg2-common:armhf librtimulib-dev librtimulib-utils librtimulib7
libruby1.9.1 libruby1.9.1-dbg libruby2.1:armhf libsbc1:armhf
libschroedinger-1.0-0:armhf libscsynth1 libsdl-image1.2:armhf
libsdl-mixer1.2:armhf libsdl-ttf2.0-0:armhf libsdl1.2debian:armhf
libsecret-1-0:armhf libsecret-common libservlet2.5-java libsgutils2-2
libshout3:armhf libsm6:armhf libsmbclient:armhf libsndfile1:armhf
libsoundtouch0:armhf libsoup-gnome2.4-1:armhf libsoup2.4-1:armhf
libspandsp2:armhf libspeex1:armhf libsrtp0 libssh-4:armhf
libstartup-notification0:armhf libswscale3:armhf libtag1-vanilla:armhf
libtag1c2a:armhf libtcl8.5:armhf libtcl8.6:armhf libtcltk-ruby1.9.1
libtdb1:armhf libtevent0:armhf libthai-data libthai0:armhf libtheora0:armhf
libtiff5:armhf libtk8.5:armhf libtk8.6:armhf libtxc-dxtn-s2tc0:armhf
libudisks2-0:armhf libusbmuxd2:armhf libv8-3.14.5 libva1:armhf
libvdpau1:armhf libvisio-0.1-1 libvisual-0.4-0:armhf
libvisual-0.4-plugins:armhf libvo-aacenc0:armhf libvo-amrwbenc0:armhf
libvorbis0a:armhf libvorbisenc2:armhf libvorbisfile3:armhf libvpx1:armhf
libvte-common libvte9 libwavpack1:armhf libwayland-client0:armhf
libwayland-cursor0:armhf libwayland-server0:armhf libwebkitgtk-3.0-0:armhf
libwebkitgtk-3.0-common libwebp5:armhf libwebpdemux1:armhf libwebpmux1:armhf
libwildmidi-config libwildmidi1:armhf libwind0-heimdal:armhf
libwnck-3-0:armhf libwnck-3-common libwnck-common libwnck22 libwpd-0.10-10
libwpg-0.3-3 libwps-0.3-3 libx11-xcb1:armhf libx264-142:armhf libxaw7:armhf
libxcb-dri2-0:armhf libxcb-dri3-0:armhf libxcb-glx0:armhf
libxcb-present0:armhf libxcb-render0:armhf libxcb-shape0:armhf
libxcb-shm0:armhf libxcb-sync1:armhf libxcb-util0:armhf libxcb-xfixes0:armhf
libxcomposite1:armhf libxcursor1:armhf libxdamage1:armhf libxfce4ui-1-0
libxfce4util-bin libxfce4util-common libxfce4util6 libxfconf-0-2
libxfixes3:armhf libxfont1:armhf libxft2:armhf libxi6:armhf
libxinerama1:armhf libxkbcommon0:armhf libxkbfile1:armhf libxklavier16
libxm4:armhf libxmu6:armhf libxpm4:armhf libxrandr2:armhf libxrender1:armhf
libxres1:armhf libxshmfence1:armhf libxslt1.1:armhf libxss1:armhf
libxt6:armhf libxtst6:armhf libxv1:armhf libxvidcore4:armhf
libxxf86dga1:armhf libxxf86vm1:armhf libyajl2:armhf libyaml-0-2:armhf
libzbar0 lightdm lightdm-gtk-greeter lp-solve lsb-release lxappearance
lxappearance-obconf lxde lxde-common lxde-core lxde-icon-theme lxinput
lxkeymap lxmenu-data lxpanel lxpanel-data lxrandr lxsession lxtask
lxterminal menu-xdg minecraft-pi netsurf-common netsurf-gtk nodejs
nodejs-legacy nodered ntfs-3g nuscratch omxplayer openbox oracle-java8-jdk
packagekit pcmanfm penguinspuzzle pi-package pi-package-data
pi-package-session pimixer pinentry-gtk2 pipanel policykit-1 poppler-data
poppler-utils powermgmt-base pypy-setuptools pypy-upstream pypy-upstream-dev
pypy-upstream-doc python-apt-common python-cairo python-chardet
python-colorama python-dbus python-dbus-dev python-distlib python-gi
python-gobject python-gobject-2 python-gpiozero python-gtk2 python-html5lib
python-minecraftpi python-ndg-httpsclient python-numpy python-openssl
python-picamera python-pifacecommon python-pifacedigitalio python-pil:armhf
python-pip python-pkg-resources python-pyasn1 python-pygame python-requests
python-rtimulib python-sense-hat python-serial python-setuptools python-six
python-spidev python-support python-talloc python-tk python-urllib3
python-wheel python-xklavier python3 python3-apt python3-chardet
python3-colorama python3-debian python3-dev python3-distlib python3-gpiozero
python3-html5lib python3-minecraftpi python3-minimal python3-numpy
python3-pgzero python3-picamera python3-pifacecommon
python3-pifacedigital-scratch-handler python3-pifacedigitalio
python3-pil:armhf python3-pip python3-pkg-resources python3-pygame
python3-requests python3-rpi.gpio python3-rtimulib python3-sense-hat
python3-serial python3-setuptools python3-six python3-spidev python3-tk
python3-uno python3-urllib3 python3-wheel python3.4 python3.4-dev
python3.4-minimal qdbus qjackctl qtchooser qtcore4-l10n raspberrypi-artwork
raspberrypi-net-mods raspberrypi-ui-mods raspi-gpio rc-gui ri1.9.1
rpi-update rsync ruby ruby1.9.1 ruby1.9.1-dev ruby1.9.1-examples
ruby1.9.1-full ruby1.9.3 ruby2.1 rubygems-integration samba-libs:armhf
scratch scrot sense-hat smartsim sonic-pi squeak-plugins-scratch squeak-vm
supercollider supercollider-common supercollider-ide supercollider-language
supercollider-server supercollider-supernova tcl8.5 timidity tk8.5
tk8.6-blt2.5 tree udisks udisks2 uno-libs3 ure va-driver-all:armhf
vdpau-va-driver:armhf wiringpi wolfram-engine x11-common x11-utils
x11-xkb-utils x11-xserver-utils x2x xarchiver xcompmgr xdg-utils
xfce-keyboard-shortcuts xfconf xfonts-100dpi xfonts-encodings xfonts-utils
xinit xpdf xserver-common xserver-xorg xserver-xorg-core
xserver-xorg-input-all xserver-xorg-input-evdev xserver-xorg-input-synaptics
xserver-xorg-video-fbdev xserver-xorg-video-fbturbo zenity zenity-common
You will need to put the emonpi into read write mode before installing any packages with $rpi-rw then back to read only when your done $rpi-ro