Begin your trip in Ahmedabad, known for its thriving textile industry and rich cultural history. Visit the Sabarmati Ashram, where Mahatma Gandhi lived and worked for many years, and the Calico Museum of Textiles, which houses a stunning collection of antique and modern Indian textiles.
Travel to Vadodara, home to one of the country's largest public sector oil companies, Indian Oil Corporation. Visit the Baroda Museum and Picture Gallery, which showcases fine arts, ethnography, and natural history exhibits. Also, make sure to visit the Laxmi Vilas Palace, an opulent 19th-century palace built-in Indo-Saracenic Revival architecture.
Surat is a hub for the diamond and textile industry. Visit the Surat Castle, also known as the Old Fort, which was built-in the 16th century. The Sardar Patel Museum houses artifacts and exhibits that reflect the cultural heritage of Surat. End the day exploring the textile market and diamond hub of the city where you can shop till you drop.
Travel west to Rajkot, a city famous for its automobile and engineering industry. Visit the Rashtriya Shala, founded by Mahatma Gandhi, which is known for its handmade paper and handmade cloth. The city also houses one of the world's biggest car manufacturers, Tata Motors. If you are interested, visit Tata Motors to see the manufacturing process of cars and other heavy vehicles.
Head to Jamnagar, one of the largest brass parts manufacturing hubs in India. Visit the Lakhota Fort and Museum, the oldest museum in Jamnagar city. The Bhid Bhanjan Temple, located in the city center, is a beautiful temple where you can experience the daily life of the people of Jamnagar and their devotion to their culture.
End your trip in Bhuj, known for its artisan handicrafts and textiles. Visit the Bhujodi village, known for its traditional weavers, producing handicrafts for generations. Visit the Shree Swaminarayan Museum, which showcases the history and culture of the Swaminarayan religion, and the Aina Mahal, a stunning palace famous for its Venetian-style mirrors and glasswork.
This itinerary covers several important industrial cities in Gujarat. If you have more time in each city, you can explore local restaurants or take a city tour to know the culture better. During summers, it's better to stay hydrated and use sun protection if you're not used to the powerful sun of Gujarat. You can remove Surat from your list if the market isn't of interest to you.