It’s tuned-ppd, not GNOME. I had the same problem on my Arch with KDE. In tuneD manager I created two user profiles
Inherited from the original with only one parameter added
And edited the /etc/tuned/ppd.conf file:
[main]
# The default PPD profile
default=balanced
battery_detection=true
sysfs_acpi_monitor=true
[profiles]
# PPD = TuneD
power-saver=powersave_nowhiteout
balanced=balanced
performance=throughput-performance
[battery]
# PPD = TuneD
balanced=balanced-battery_nowhiteout
To make the power profile option slider in the taskbar to work normally