SiIvaGunner is the channel that inspired TimmyTurnersGrandDad. Under a character of the same name, SiIvaGunner's videos consist of bait and switch videos, with jokes, memes, or parodies of video game music.
Several of the jokes that originated from the SiIvaGunner channel have been used on TimmyTurnersGrandDad. SiIvaGunner has been credited as a ripper on TTGD, both as a joke and as credit for using the channel's audio.
TimmyTurnersGrandDad used to have a ban on post-2016 SiIvaGunner memes because they didn't want to copy SiIvaGunner. However, on February 23, 2018, the cut-off point was changed to August/July 2017. This means that "Smooth", "Wood Man", and "Haunted House" are now allowed to be used on TimmyTurnersGrandDad.
- SiIvaGunner has included "Play a Mini-Game!" in a number of rips as a nod to TTGD. They also included "Bumblicious" in at least one rip after its debut on TTGD.
- Many TTGD contributors have also contributed to SiivaGunner some even later joining the SiivaGunner team. This is also true the other way around where some SiivaGunner Contributors have contributed to TTGD and join the TTGD team.
- SiIvaGunner has its own wiki, so go and help out over there!
- SiIvaGunner's YouTube about page
- TimmyTurnersGrandDad Discord fanserver