You mean like clouds of steam? Then yes it could be.
If you mean just a puff of smoke, that could be white or whitish-blue (oil burning) which could be a turbo seal.
Best test for head gasket is to pressurize cooling system with a pump and then remove spark plugs and look for coolant on the tips. Then you know without a doubt.
Are you losing coolant. That + white smoke is a bad sign.