देवीभागवतपुराणम्/स्कन्धः ११/अध्यायः २१
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Addressing Gayatri as the ‘Mother of Veda’ in this chapter, the Devi Bhagavatam concludes that all Gayatri worshipers are indeed Shaktas:
सर्वे शाक्ता द्विजाः प्रोक्ता न शैवा न च वैष्णवाः ।
आदिशक्तिमुपासन्ते गायत्रीं वेदमातरम् ॥ ६ ॥
Gayatri is called ‘Adi Shakti’ in this verse. Similarly the Mahanarayanopanishat of Krishna yajurveda also describes Gayatri as ‘Jagatkaarana’ (Creatrix of the world).
Also Sri Sanatana Goswami, a Gaudiya Vaishnava, has also said this in his Haribhaktivilasa:
हरिभक्तिविलासः
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ब्राह्मणाः शाक्तिकाः सर्वे न शैवा न च वैष्णवाः ।
यत उपासते देवीं गायत्रीं वेदमातरम् ॥ ३.३१० ॥
या च सन्ध्या जगत्सूतिर्मायातीता हि निष्कला ।
ऐश्वरी केवला शक्तिस्तत्त्वत्रयसमुद्भवा ॥ ३.३११ ॥
These Vaishnavas call Gayatri as Jagatsuti (Source of creation), Mayateeta (That which transcends Maayaa).
So the Vedic consensus is that Gayatri is a female deity.
Om Tat Sat