They are still making Goat G-1's to this day for issue to aircrew. The difference is that now they can use both Goat and Cow.
Who are "they"? Any valid examples [contract ones] of modern G1s where goat hide was used? This would be interesting As far as I'm aware, there is no goat hide mentioned in MIL-DTL-7823F 9 June 2020, only reference for this can be found in KK-L-170C. As per current mil-specification, no goat hides are used for any contract garment.
MILITARY DETAILED SPECIFICATION LEATHER, CATTLEHIDE, DEERSKIN AND HORSEHIDE, CHROME TANNED
This specification is approved for use by all Department and Agencies of the Department of Defense.
1. SCOPE This Military Detailed Specification covers the requirements for full grain cattlehide, deerskin and horsehide; and the cattlehide flesh splits.
1.2 CLASSIFICATION. The leather will be in the following types:
Type I - Cattlehide, full grain, for garments and equipage
Type II – Deerskin, full grain, for garments and equipage
Type III Horsehide, full grain for garments and equipage
Type IV – Cattlehide, flesh splits for garments and equipage
(Classes 1 and 2 are applicable to types I, II, III and IV only)
Class 1 – Mildew resistant treated
Class 2 - Not mildew resistant treated
Type V - Cattlehide, full grain for gloves
Type VI - Deerskin, full grain for gloves
Type VII – Horsehide, full grain for gloves
Type VIII – Cattlehide flesh splits for gloves
[Based on MIL-DTL-32092 November 8, 2001 SUPERSEDING KK-L-2004 November 15, 1976]