G-Shock is a product line of Casio that was introduced in April of 1983. An abbreviation for “Gravitational Shock”, they were designed to be resistant to mechanical stress, shock, and vibration.
Honda F1
Two co-branded Honda F1 models were introduced shortly after the creation of the G-Shock line. The first was the DW-5000C-Honda, which were made for Honda engineers and factory employees who developed the engine run by Spirit Racing during the 1983 Formula 1 season. This was followed by the DW-5200C-Honda, released in 1984 with a slightly more general “Honda Racing Team International” co-branding.
Williams F1
The G-Shock DW-6600-Williams was released by Casio in 1997, and was a co-branded model with the Williams F1 team. This would have coincided with the tail end of Adrian Newey’s time with the team, having just won back to back constructors’ and drivers’ world titles.
While G-Shock did not appear to have the same level of sponsorship status like Oris or Bremont, the release of a Williams model is still noteworthy.
Kawasaki MotoGP
The G-Shock line made its first MotoGP appearance in 2005 with the G-300KRT-1AV and G-300KRT-3AV models. These were collaborations with the Kawasaki Racing team, with marketing materials featuring riders Shinya Nakano and Alex Hoffman.
The G-Shock G-7710KRT-3 Kawasaki Racing Team was released in 2007, although it’s unclear if this was specific to MotoGP or World Superbike team.
Suzuki MotoGP
Casio worked with Suzuki in 2017 to create the G-Shock 990F0-M7GSW-000 Suzuki Ecstar MotoGP edition.
References
http://www.gsking.net/uebersicht-modell-geschichte-der-g-shock-dw-5000er-screwback-serie-1-generation/
https://store.shopping.yahoo.co.jp/tento1010/rc-it4y1gp60ei8-piqs.html
https://www.watchuseek.com/threads/g-shock-made-for-drivers-or-driving-enthusiasts.4726975/
https://www.watchuseek.com/threads/kawasaki-g300-g-shock-kawasaki-racing-team-eu.5132819/
https://casiofanmag.com/g-shock/g-300krt/
https://casiofanmag.com/news/g-7710krt-3-g-shock-kawasaki-racing-team-limited/
https://www.facebook.com/photo.php?fbid=1452482754828444&id=137375103005889&set=a.142621809147885
https://marketplace.watchcharts.com/listing/2447253-ecstar-gsx-rr-motogp-shock-watch-casio-genuine-990f0-m7gsw-000