Yes, unfortunately 2006 content is antiquated, GWD kill count the old school way is severely annoying and outdated too.
Fortunately in RS3, we have better way to leave such antiquated and annoying GWD kill count ordeal a distance memory. Introducing....
Anachornia Totem of Intimidation
:
The Totem of Intimidation is a totem that grants the ability for the player to skip the kill count at the God Wars Dungeon (does not include Nex). It is created by combining the top, middle, and base pieces. Each piece can be obtained via different activities on Anachronia.
https://runescape.wiki/w/Totem_of_Intimidation
For those who don't meet the requirements for getting Totem of Intimidation, fortunately we also have Soulstones and Omin Soultone:
Soulstones are items obtained from the God Wars Dungeon that store killcount of the respective boss. They are only obtainable as an uncommon drop from the respective god's general in hard mode fights. Soulstones will receive one charge per boss kill in hard mode and one charge for every five boss kills in normal mode.
https://runescape.wiki/w/Soulstone
An omni soulstone is created by combining the Zamorakian soulstone, Saradominist soulstone, Bandosian soulstone, and Armadylean soulstone. This can only be done when in close proximity to the altar just east of the rope exit in the God Wars Dungeon (within the slightly elevated platform). Each soulstone has a drop rate of 1/25 from the hard mode version of the respective God Wars general.
https://runescape.wiki/w/Omni_soulstone