The various Swarupas of Gayatri as created by Maha Deva and the related Mantras are:
Tatpurushaaya vidmahey Vaagshuddhaaya Dhimahi tannah Shivah Prachodayaat
Ganaambikaayai vidmahey Karma saadhyaih cha dhimahi, Tanno Gauri Prachodayaat/
Tatpurushaaya vidmahey Maha Devaaya Dhimahi, Tanno Rudrah prachodayaat/
Tatpurushaaya vidmahey Vakratundaaya Dhimahi, Tanno Dantih prachodayaat/
Maha Senaaya vidmahey Vaagvishuddhaaya dhimahi, Tannah Skandah prachodayaat/
Tikshna shringaaya vidmahey Veda paadaaya dhimahi, Tanno Vrishah prachodayaat/
Harivaktraaya vidmahey Rudravaktraaya dhimahi, Tanno Nandee prachodayaat/
Naraayanaaya vidmahey Vaasudevaaya dhimahi, Tanno Vishnuh prachodayaat/
Mahaambikaayai vidmahey karma siddhaaih dhimahi, Tanno Lakshmi prachodayaat/
Samruddhaayai vidmahey Vishnunaikena dhimahi, Tanno Dharaa prachodayaay/
Vainateyaaya vidmahey Suvarna pakshaaya dhimahi, Tanno Garudah prachodayaat/
Padmodbhavaaya vidmahey Veda Vaktraaya dhimahi, Tannah Srashta prachodayaat/
Shivaasya jaayai vidmahey Deva rupaayai dhimahi, Tanno Vaachaa prachodayaat/
Devaraajaaya vidmahey vajrahastaaya dhimahi, Tannah Shakrahy prachodayaat/
Rudra netraaya vidmahey Shaktihastaaya dhimahi, Tanno Vahnih prachodayaat/
Vaivaswataaya vidmahey Dandahastaaya dhimahi, Tanno Yamah prachodayaat/
Nishaacharaaya vidmahey Khadga hastaaya dhimahi, Tanno Nirrutih prachodayaat/
Shuddhahastaaya vidmahey Paasha hastaaya dhimahi, Tanno Varunah prachodayaat/
Sarva Praanaaya vidmaheyYashti hastaaya dhimahi, Tanno Vaayuh prachodayaat/
Yaksheswaraaya vidmahey Gadaa hastaaya dhimahi, Tanno Yakshah prachodayaat/
Sarveshwaraaya vidmahey Shula hastaaya dhimahi, Tanno Rudrah prachodayaat/
Katyaayanaaya vidmahey Kanya kumaaryai dhimahi, Tanno Durgaa prachodayaat/
Yevam Prabhidya Gayatrim Tattaddevaanu rupatah, Pujayet staapayetteshaamaasana pranavam smritam/
Athavaa Vishnumatulam suktena Purushena vaa, Vishnum chaiva Maha Vishnum sadaa Vishnumanukramaat sthaapayeyddeva Gayatraya parikalpya vidhaanatah/
(In case Vishnu or Vsihu’s Amsha Devas are to be installed then such idols be erected by reciting the Mantra viz. Om namo Naraayanaaya namah; or alternatively with the recitation of
Om Namo Vaasudavaaya namah Sankarshanaaya cha
Pradyumnaaya Pradhaanaaya Aniduddhaaya vai namah/)