Is a gem ready for Rails 4 or 5?

Rails 4: 615 ready, 38 not ready, and 433 unknown
Rails 5: 163 ready, 11 not ready, and 912 unknown

Gems unknown for Rails 4

Name Status Rails 4 Notes Rails 4 Status Rails 5 Notes Rails 5 Status or notes updated
flatiron-rails unknown unknown about 6 years ago
flexible_config_loader unknown unknown about 6 years ago
florida-rails unknown unknown about 6 years ago
fool-rails unknown unknown about 6 years ago
fullcalendar-rails, unknown unknown about 6 years ago
funny-rails unknown unknown about 6 years ago
g5_sibling_deployer_engine unknown unknown about 6 years ago
gakusei unknown unknown about 6 years ago
gem_with_nothing unknown unknown about 6 years ago
geokit-rails3 unknown unknown about 6 years ago
geo_location unknown

d

unknown over 5 years ago
geothird-friendly_id unknown unknown about 6 years ago
globe_oracle unknown unknown about 6 years ago
google-api-client unknown

unknown

unknown over 5 years ago
groupon-cache-money unknown unknown about 6 years ago
guard-spork unknown unknown about 6 years ago
guilleiguaran-actionwebservice unknown unknown about 6 years ago
haha-rails unknown unknown about 6 years ago
haml-contrib unknown unknown about 6 years ago
hand-rails unknown unknown about 6 years ago