Not GP, but LibreOffice is much more actively developed than OpenOffice.org currently. Any more it looks like OO.org is just getting maintenance from a few IBMers [1]. It's rather a shame, with all of the brand recognition that was built up in OpenOffice before being acquired by Oracle.

[1] - https://lwn.net/Articles/637735/

It's only mostly-dead, but that mostly is enough. Basically, LO is where all the action is, and even IBM has effectively given up on AOO. See the LWN article linked by rpcope1.