As you know with a G1 license in Ontario, Canada one of the conditions of your license level is that you must be accompanied by a fully licensed driver, who has at least four years driving experience, and a blood alcohol level of less than .05 per cent, in case he/she needs to take over the wheel.
So driving without a fully licensed driver is against the restrictions placed on your license. This means driving with a passenger having only a G2 driver accompanying you in a vehicle would not conform to the conditions of your G1 licence just as driving alone does not.
The Ministry of Transportation DriveTest site notes that if the police stop you for any reason, the officer checking your licence will see that you are a Level One or Level Two driver. If you are charged with and convicted of breaking any of the conditions or restrictions connected to your licence type, your licence will be suspended for 30 days. It appears you will need to physically turn in your license for this time period and also have to pay a reinstatement of around $150 to get your G1 back.
Part of the conditions for a G1 licence is that you must drive with a fully licensed driver (with 4 years of experience) who must sit in the front seat with you so to legally drive you will need to follow this guideline.
To find out if there is a fine, demerit points or a delay in being able to obtain a G2 license if you are caught without the required licensed driver, check with the Ministry of Transportation (MTO).Get a Canadian auto insurance quote here.