Hey, GOSI is also a social insurance, and you will note that all medical centers in Saudi Arabia have a GOSI counter to serve the employees. It has limited coverage and liability towards expats. Yes, you are correct, it did not have any relevance to the discussion, but just thought of mentioning.
@Ed, answering your second query: As per the contract, if an employee's status is single, and if this employee gets his family, the responsibility for covering the family's insurance will be on the employee's shoulders. He has to pay up to the company to cover his family as well before issuing the Iqama for the family. Most companies cover employees' families against payment as it has the advantage of having "Maternity also covered" under the group policy, and besides, the premium is economical.
"Regret my confusion on GOSI and insurance question."
Regards, Ukmitra