The best replacement for gsa is solr.

The best alternatives to gsa are rated as following:
★★★★★  solr
★★★★★  fss
★★★★  open market
★★★  scrapebox
★★  magic submitter
★★  google mini
★★  ia
★★  eca
★★  gs
★  xrumer
★  senuke
★  swingbyte
★  oig
★  gstl
★  ccr

Your alternative for gsa is not listed? Suggest!
Speaking about gsa, one probably shouldn't forget about abstracts.

Other search terms related to gsa and their ratings are:
★★★★★ abstracts
You have in mind a companion for gsa and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of gsa in all years. Click on graph for more.
gsa
solr
fss