Guaranteed Insurability Option Rider (GI): Insurance needs change as one grows older. (tomorrowmakers.com)
Commonly shortened to just GIO rider (for guaranteed insurability option), this popular feature lets the policyholder buy additional coverage for their -LSB-...] (bestliferates.org)
Guaranteed Insurability Option Agreement — guarantees the addition of more coverage at certain ages and life events with no evidence of insurability. (insuranceandestates.com)