if you have internet access, yo can down load gimp from online site,
if not, you can use other computers to copy to usb memstick or cd, then copy to you computer,
unknown is laptop OS win/ apple/ linux, those may vary, win uses gtk , mac uses x11,
GIMP
http://www.gimp.org/Gimp ~win has GTK
http://gimp-win.sourceforge.net/stable.htmlGIMP Portable usb
http://portableapps.com/apps/graphics_p ... p_portable Gimp.app ~mac
http://gimp-app.sourceforge.net/GIMP on OS X
http://gimp.lisanet.de/Website/Overview.htmlXQuartz X11mac (only if needed)
http://xquartz.macosforge.org/trac/wikiGTK+ - Download for Windows (only if needed)
http://www.gtk.org/download-windows.html..