client/lib/gsuite/index.js
function canDomainAddGSuite( domainName ) {
	const GOOGLE_APPS_INVALID_SUFFIXES = [ '.in', '.wpcomstaging.com' ];
	const GOOGLE_APPS_BANNED_PHRASES = [ 'google' ];
	const includesBannedPhrase = some( GOOGLE_APPS_BANNED_PHRASES, bannedPhrase =>
		includes( domainName, bannedPhrase )
	);
	const hasInvalidSuffix = some( GOOGLE_APPS_INVALID_SUFFIXES, invalidSuffix =>
		endsWith( domainName, invalidSuffix )
	);

	return ! ( hasInvalidSuffix || includesBannedPhrase || isGSuiteRestricted() );
}
function canDomainAddGSuite( domainName ) {
	const GOOGLE_APPS_INVALID_SUFFIXES = [ '.in', '.wpcomstaging.com' ];
	const GOOGLE_APPS_BANNED_PHRASES = [ 'google' ];
	const includesBannedPhrase = some( GOOGLE_APPS_BANNED_PHRASES, bannedPhrase =>
		includes( domainName, bannedPhrase )
	);
	const hasInvalidSuffix = some( GOOGLE_APPS_INVALID_SUFFIXES, invalidSuffix =>
		endsWith( domainName, invalidSuffix )
	);

	return ! ( hasInvalidSuffix || includesBannedPhrase || isGSuiteRestricted() );
}
Can a domain add G Suite

@param {String} domainName - domainname
@returns {Boolean} -Can a domain add G Suite