The best replacement for galaxy gear is pebble.

The best alternatives to galaxy gear are rated as following:
★★★★★  pebble
★★★★  galaxy gear 2
★★★★  smartwatch 2
★★★  sony smartwatch
★★★  android wear
★★★  google glass
★★★  sony sw2
★★  pebble watch
★★  sony smartwatch 2
★  gear 2 neo
★  pebble smartwatch
★  iwatch
  qualcomm toq
  sony smart watch
  i'm watch

Your alternative for galaxy gear is not listed? Suggest!
Speaking about galaxy gear, one probably shouldn't forget about nexus 5.

Other search terms related to galaxy gear and their ratings are:

★★★★★ nexus 5
★★★★★ s4
★★★★★ note 2
★★★★ s3
★★ note 3
purchase of galaxy note 3
s4 mini
You have in mind a companion for galaxy gear and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of galaxy gear in all years. Click on graph for more.
galaxy gear
galaxy gear 2