I've been looking all over for complete GPCR pathways maps. Does anyone know where I can find them?

See:

http://escience.invitrogen.com/ipath/ and browse button.

http://www.biocarta.com/genes/allpathways.asp

http://www.biocarta.com/genes/CellSignaling.asp

http://stke.sciencemag.org/cgi/collection/canonical_pathways

These are not intended specifically for GPCRs, but there are some.
Have a good search!
Val

... I forgot this beautiful site:

http://www.signaling-gateway.org/molecule/

Bye Val