Gill is now facing several firearms-related charges as well as one charge of trafficking in a controlled substance. He has been remanded in custody until his next scheduled court appearance on May 29.
Hayer has been charged with one count of possession of a controlled substance for the purpose of trafficking. He has been released and is expected to appear in court on June 3.
The pair were arrested after police executed a search warrant at a home located on the 7300 block of 123 Street in Surrey on March 12.
Inside they found and seized a "bulk" of marijuana, four rifles, and one handgun, according to the Combined Forces Special Enforcement Unit of B.C.
The guns are being forensically examined to determine if there may be any links to any other crimes, say police.
There have been about two dozen gang-related shootings in Delta and Surrey since March. Police have said rivaling groups of low-level drug dealers are engaged in a turf war.
Surrey RCMP set up a special tip line on April 20 and have been encouraging anyone with information about the violence to call 604-915-6566.
As of Wednesday, police say the tip line has received 148 calls, 15 of which have been "of high value" to ongoing investigations.