client/lib/gsuite/index.js
function getGSuiteSupportedDomains( domains ) {
	return domains.filter( function( domain ) {
		const wpcomHosted =
			includes( [ domainTypes.REGISTERED ], domain.type ) &&
			( domain.hasWpcomNameservers || hasGSuite( domain ) );
		const mapped = includes( [ domainTypes.MAPPED ], domain.type );
		const notOtherProvidor =
			domain.googleAppsSubscription && domain.googleAppsSubscription.status !== 'other_provider';
		return ( wpcomHosted || mapped ) && canDomainAddGSuite( domain.name ) && notOtherProvidor;
	} );
}
function getGSuiteSupportedDomains( domains ) {
	return domains.filter( function( domain ) {
		const wpcomHosted =
			includes( [ domainTypes.REGISTERED ], domain.type ) &&
			( domain.hasWpcomNameservers || hasGSuite( domain ) );
		const mapped = includes( [ domainTypes.MAPPED ], domain.type );
		const notOtherProvidor =
			domain.googleAppsSubscription && domain.googleAppsSubscription.status !== 'other_provider';
		return ( wpcomHosted || mapped ) && canDomainAddGSuite( domain.name ) && notOtherProvidor;
	} );
}
Filters a list of domains by the domains that eligible for G Suite

@param {Array} domains - list of domain objects
@returns {Array} - Array of G Suite supported domans