Declension table of ?gāyatrya

Masculine	Singular	Dual	Plural
Nominative	gāyatryaḥ	gāyatryau	gāyatryāḥ
Vocative	gāyatrya	gāyatryau	gāyatryāḥ
Accusative	gāyatryam	gāyatryau	gāyatryān
Instrumental	gāyatryeṇa	gāyatryābhyām	gāyatryaiḥ gāyatryebhiḥ
Dative	gāyatryāya	gāyatryābhyām	gāyatryebhyaḥ
Ablative	gāyatryāt	gāyatryābhyām	gāyatryebhyaḥ
Genitive	gāyatryasya	gāyatryayoḥ	gāyatryāṇām
Locative	gāyatrye	gāyatryayoḥ	gāyatryeṣu

Compound gāyatrya -

Adverb -gāyatryam -gāyatryāt